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Proceedings Paper

Common Path Interferometer Using Optically Induced Molecular Reorientation In Liquid Crystals
Author(s): C. P. Grover
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Paper Abstract

Optically induced molecular reorientation in nematic liquid crystals has been used to obtain a common path interferometer for measuring aberrations of the incident beam. When a strong laser beam is focussed onto homeotropically aligned liquid crystals, it produces above a threshold value, a molecular distortion, the profile of which depends upon the point spread function of the incident beam. The strong zero spatial frequency component creates a highly distorted centre due to the crystal birefringence producing a diverging spherical reference wavefront. This interferes with the directly transmitted aberrated wavefront producing fringes in the same way as in the point-diffraction interferometer. This interference phenomenon occurs in the extraordinary wave and resulting fringes represent directly the thickness contours of the incident wave.

Paper Details

Date Published: 25 November 1986
PDF: 5 pages
Proc. SPIE 0661, Optical Testing and Metrology, (25 November 1986); doi: 10.1117/12.938594
Show Author Affiliations
C. P. Grover, National Research Council of Canada (Canada)

Published in SPIE Proceedings Vol. 0661:
Optical Testing and Metrology
Chander Prakash Grover, Editor(s)

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